基于单片机的数字电压表程序代码（C代码）

冯叔 · 发表于 2016-9-19 22:35:56

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# include <reg52.h>
# include <intrins.h>
# define uchar unsigned char
# define uint unsigned int
sbit CLOCK=P3^6;
sbit START=P3^7;
sbit EOC=P3^4;
sbit OE=P3^5;
sbit ALE=P3^3;
sbit A=P3^2;
sbit B1=P3^1;
sbit C=P3^0;
long x,y,shu,ge,fen1,fen2,fen3,jia,j;

void delay(int z)
{
int a ,b;
for(a=z;a>0;a--)
for(b=110;b>0;b--);
}

uchar code table[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef};
uchar code table1[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void display(uint ge,fen1,fen2,fen3)
{
if(jia%2!=0)
{
P0=0x40;
P2=0xfe;
delay(1);
P2=0xff;

P0=table1[ge];
P2=0xfd;
delay(1);
P2=0xff;

P0=table[fen1];
P2=0xfb;
delay(1);
P2=0xff;

P0=table1[fen2];
P2=0xf7;
delay(1);
P2=0xff;

//    P0=table1[fen3];
//    P2=0xf7;
//    delay(5);
//    P2=0xff;
}
if(jia%2==0)
{

P0=table1[ge];
   P2=0xef;
delay(1);
P2=0xff;
P0=table[fen1];
P2=0xdf;
delay(1);
P2=0xff;
P0=table1[fen2];
P2=0xbf;
delay(1);
P2=0xff;
P0=table1[fen3];
P2=0x7f;
delay(1);
P2=0xff;
}
}

void main()
{
TMOD=0x11;
TH0=(65536-10)/256;
TL0=(65536-10)%256;
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
ET1=1;
TR1=1;
ALE=0;
START=0;
OE=0;
while(1)
{
      ALE=1;
      START=0;
      _nop_();
      START=1;
      ALE=0;
      START=0;
      display(ge,fen1,fen2,fen3);
      while(EOC==0);
      P1=0xff;
      OE=1;
      x=P1;
      shu=x*196;
      ge=(shu*5)/100000;
      fen1=(shu*5)/10000%10;
      fen2=(shu*5)/1000%10;
      fen3=(shu*5)/100%10;
}
}
void time() interrupt 1
{
TH0=(65536-10)/256;
TL0=(65536-10)%256;
CLOCK=~CLOCK;
}
void time2() interrupt 3
{
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
j++;
if(j>59)
{
      j=0;
      jia++;
      if(jia%2==0)
      A=B1=C=0;
      if(jia%2!=0)
      {
         B1=C=0;
         A=1;
      }
}
}